This project aims to teach children what sustainable cities should be like in fun and interactive ways. Students aged 4–6 will explore their imagined sustainable cities by working on themes such as eco-friendly transportation, recycling, green spaces, clean energy, and community life. Throughout the project, the process will be supported by joint activities in Turkish and English, storytelling, art projects, digital collaborations, and nature observations. In this way, children will both develop environmental awareness and learn to communicate with friends from different cultures.